Oil burner for furnaces



June 29 1926.

R. CRINNIAN OIL BURNER FOR FURNACES 2 SheeisSheet 1 Filed Nov. 17. 1923 fuvguraa B %ORNBY Julie 29 R. CRINNIAN OIL BURNER FOR FURNACES I 2 SheetsSheet 2 Filed Nov. 17 1923 IMvsNTaR patented June 29, 1926.

UNHED STAT ROBERT 'GRINNIAN,

COMPANY, A CORPORATION OF MICHIGAN.

OIL BURNER FOR FURNACES.

Application filed November 17, 1923. Serial No. 675,424.

The object of my invention is to produce an oil burner that can be easily installed in the fire box of the ordinary furnace, without dis-assembling the furnace, or changing or re-arranging the interior of the furnace to allow the installation.

A further object is to provide an oil burner that can be substituted in the ordinary furnace at any time, and used in the place of the ordinary fuel, such as coal, coke or wood, by simply placing the burner within the furnace and connecting with the oil supply.

A further object is to produce an oil burner that is simple in construction, easily and efliciently operated and can be manufactured at a low cost. v

These several objects are secured in their preferred form by the construction and arrangement of parts more fully hereafter set forth.

Similar parts on all drawings are marked by similar numerals.

Fig. 1, is a side view of the oil burner, showing the relative position of the'base, air head chamber and burner.

Fig. 2, is an end View of the burner section.

Fig. 3, is the top view of the burner and air chamber.

Fig. 4, is a section of the burner on -'AA of Fig. 8, showing the construction and arrangement of parts.

Fig. 5, is an enlarged detail of the burner.

Fig. 6, shows the oil burner as installed within a furnace and connected to the oil supply.

Fig. 7 is the top section taken on line -BB' of Fig. 6, showing the relative position of the burner to the supporting grates in the fire box.

I will now describe more fully the detailed construction of my oil burner, referring to the drawings and the marks thereon.

The general construction of the burner comprises a cost iron circular base casting,

of a size that will fit over the grates of the furnace fire box, and rest thereon, the base casting being hollow and open at the bottom side to allow free passage of air therethrough. Mounted on top of the base casting is the burner support plate, with the oil burner attached thereto. Above the burner and attached tothe base casting is the air chamber head so designed as to conduct the air from the. base through the heated chamber, and to the burner. Attached to the burner base, isthe oil supply pipe con necting the burner directly with the supply oil tank, installed without the furnace. v

The base casting 1 is a hollow circular casing, made of any material suitable to withstand the heat of the furnace, and comprises two half sections -X- and -Y. The base casting being made in sections to allow it being installed through the door of the furnace without dis-assembling same when desiring to insert the oil burner there in. The halves of the base, X'and Y, are bolted together at the sides by means of the bolts '2-' passing throughthe projecting OF DETROIT, MICHIGAN, ASSIGNOR '10 DETROIT OIL BURNER lugs on the castings. The top of the base.

casting 1 is countersunk as shown in Fig. 4 to receive theburner plate 3- therein, and is open to allow the passage of air therethrough. The burner plate 8 is attached to the main casting by means of bolts and lugs, and fits over the opening in the top of the base 1-. In the center of the burner plate3, is a circular recess forming an over-flow oil bowl a, and having the burner-block -Z cast therein, and provided with openings to convey oil. and air to the burner. The center of the burner block b is counter bored lengthwise through the block, and carries mounted there on, the oil burner -l. The oil passage throughthe center of the burner 4: connects with the counter bore in the burner block b-, to which is attached the oil feed pipe 5. Along the sides of the burner block b, are also air passages c-, leading from the open base casting 1 to the under side of the burner t. The burner being supported by small boss projections -cZ, shown in Fig. 5, allows the air to pass out under the burner block. To the bottom of the over-flow bowl -a is attached the overflow pipe 6. The burner 4. may be cast, or it may be turned from a solid piece of metal, and comprises a burner head having a series of concentric circular grooves, designed and positioned with the oil supply pipe attached to and overflowing through the center thereof. Each of the concentric circular grooves is positioned lower than the adjacent inner groove, to receive and retain the overflow oil from the inner compartment as it reaches its capacity for combustion. The burner is shown in an enlarged detail in Fig. 5,.show the oil channel fthrough the center of the burner, and has its opening at the highest point thereof and is surrounded by the concentric oil groves g, .hand k-. Should the oil from the tank .be fed too fast in the burner, or beyond its capacity of combustion, the-oil then overflows the'last groove icand into the-oil bowl a and is drawn off through the overflow pipe The burner 4- has a Variable capacity, and is adaptable to very low, or extremely high heat, because of the stopped circular grooves therein; And at a slow feed of oil therein, the inner oil groove only will be operative, burning with a small flame, As the flow of oil is increased, and the capacity of theinner groove is reached, the oil overflows int-othe next adjacent oi'l groove, and an added flame from the second groove increases the capacity of the burner.

When all of the grooves are filled and the capacity of the burner is reached, the overflow oil passes: into the bowl aand is drawn off. The combustion of the oil, heats the adjacent ring walls, thus aiding the vaporization of the oil,.and increasing the efiiciency of the burner. At the opposite sides of the burner plate -3, are large cylindrical air portals -7, openingdirectly into the base casting -l, and having an upward projection for receiving the portals of the air chamber head -8. The portale of the air chamber head 8' arealso circular in form and fit over the projecting ai r portals -7, The chamber head is a hollow rectangular casting with the intake air portalsat the ends thereof, and an outlet portal in the center of the bottom wall directly over the burner 4-. The chamber- --8 is provided withdefiectors and n, so designed and positioned as to deflect the air from the intake portals back through the center portal -p-, directly 011 the burner, for aiding combustion' The end deflectors 4n direct the airtoward the center of the casting, and the V- shaped deflector'n-- in the center of the chamber unites both volumes of air and directs same to the center passage over the burner. I

In installing the oilburn'er within the furnace, the base casting 1 is placed on the fire grates, and the intervening space between the casting and the furnace walls, filled in with ashes ormortar, thus forcing the air to enter the burner through the base 1, through thechamber 8 or the passages c vin the burner block b. The furnace door may be closed completely and the burner regulatedby the air draft in the ash pit; Theoil feed pipe passes out of the furnace and leads to the oil supply tank -9, as provided away from the furnace. The oil for the burner is regulated bythe valves"-l0- and -1l, and the capacity of the burner governed as desired. The valve ril0 is a standard oil valve suitable for such purposes, and may be set and regulated for a continuous flow of oil therethrough, while the trap valve 11 remains open; Should the valve +101: be opened too far, and beyond the capacity of the oil burner, the oil will overflow-the burner, into the bowl flea-e and drain ofi through the pipe -6 leading backtothe trap pail --12 attached to the operating valve lever of the trap valve A- -ll' As the pail -l2 becomes filled, the weight of the oil closes the trap valve T1111", and stops the oil supply to the burner.

I do not wish to be confined to the: exact construction of my oil burner as heretofore set forth, but claim all types of oil burners that is substantially a substitution: of parts herein shown and described.

Having fully described my oil burner, what I claim as my invention and desire to secure by Letters Patent is:

'An oil burner adapted to be installed within the fire box of a furnace, comprising a hollow base casting'for covering'the entire furnace grate, a detachable burner plate mounted on the top of said base casting and securely attached thereto, said burner plate having a large-air port'positi'oned on each side ofthe center and opening into the base casting, an over-flow oil cup formed in the center of said burner plate and positioned between the two air ports therein, means for removing a surplus of oil from. the said over-flow cup, a stepped, conical oil burner mounted in the center of'said overflow oil cup and extending above thereof, said oil burner comprising a series of concentric rectangular shaped oil chamber grooves, so positioned that the top ofeach groove chamber is higher than its adjacent outside groove chamber, and'separated therefrom only by a thin sheet wall of metal, an oil supply pipe formed through the center of said'burner and having its outlet port slightly above the inner oil groove chamber for overflowing therein, I means for supplying fuel oil thereto, vertical side air channels formed in the burner plate adjacent to the burner support, for passing air from the base of the casting around the outside of the burner, a hollow rectangular air chamber mounted onthe top of the burner plate and having the endsthereof connested to and opening into the burner plate and a, V-shapeddefleotor formed in the top air ports, said horizontal air chamber beof the chamber directly over the burner ing positioned above and over the oil burner port.

and provided with a burner port in the In Witness whereof I sign these specificabottoln thereon directly over the burner, a tions.

curved air deflector positioned inside the horizontal air chamber at each end thereof, ROBERT CRINNIAN. 

